nations. one senior government official here in seoul tells me that a motivation behind this rocket launch may also be domestic instability. the source says that kim jong-un's rule may not be as secure as previously thought. and this kind of rocket launch could deflect any attention from that. tom? >> as you may recall, the last launch there did not go very well at all. >>> next to gaza city, where after 45 years in exile, one of the founders of hamas, khalid meshaal, made a historic return today. the pomp and circumstance surrounding his visit underscored the organization's powerful influence among palestinians. cnn's fred pleitgen was there. >> reporter: he received a triumphal welcome when he entered gaza. tens of thousands of hamas fighters lined the street wearing ski masks and combat fatigues and flashing their weapons, including ak-47s and rocket-propelled grenades. the official reason why meshaal is here after never having been in gaza before is the 25th anniversary of the founding of